my sister leases a new f150 every 2 years. she has had just about every possible combo.
the 5.4 3v has decent power compared to a 2v, but still has issues. the later models dont spit plugs, but will still drop coils.
my 02 v10 has only dropped 2 coils in 130k though.
her new 5.0 6spd auto is sweet! it has great power!
if you can, hold out for a 5.0L!